On Monday morning, five of the most productive first basemen in the National League were due to become free agents after the 2011 season: Albert Pujols, Ryan Howard, Adrian Gonzalez, Prince Fielder and Lance Berkman. Monday afternoon, that number was reduced to four when the Phillies inked Howard to a five-year extension worth $125 million with a club option for a sixth season that includes a whopping $10 million buyout.